target names in wfpc2 output folders still have underscores

[scfleming]

A closed Issue changed the output directory format to be of the form "proposalid_targetname", where targetname needed to have all underscores (_) replaced with dashes (-). I found that while this was true for acs and wfc3 output folders, some (or maybe all) of the wfpc2 output folders still had underscores in the targetname part. I fixed this manuallly at MAST, but the pipeline should make sure it treats wfpc2 output folders in the same manner as the acs and wfc3.

[ktfhale]

When we transitioned to the MAST conventions, I wrote a separate script to go through the existing outputs and rename them. I think I initially had the target names separated by underscores, realized this was wrong, and changed it soon after to separate them by dashes. But I may have neglected to fix some of the files that had already been renamed before I realized my error.

The pipeline itself shouldn't ever separate target names by underscores, and at the moment I don't think it can. So it's just a matter of going back through our archive and fixing the bad names.